Census tract · Columbia County
Census Tract 306.03, Columbia County, Georgia
Census Tract 306.03, GEOID 13073030603, in Columbia County, Georgia, entirely within Martinez. 4,198 residents in the ACS 2020-2024 5-year estimates (±593); the 2020 Census counted 4,323.
Residents, 2020-2024
4,198
±593 (90% margin)
2020 Census count: 4,323
Median household income
$73,355
±$23,173 (90% margin)
Columbia County: $95,592
Median home value
$224,900
±$12,202 (90% margin)
Columbia County: $305,300
Median gross rent
$1,262
±$177 (90% margin)
Columbia County: $1,409
Where is Census Tract 306.03?
Census Tract 306.03 is one of 25 census tracts in Columbia County, Georgia. It covers 1.80 square miles of land, 2,403 residents per square mile in 2020. Its GEOID, 13073030603, names it uniquely (how tract numbers and GEOIDs work).
| Place | Share of the tract |
|---|---|
| Martinez | 100% |
4 census tracts border Census Tract 306.03: Tract 301.05 ($97,531), Tract 301.06 ($76,935), Tract 302.01 ($73,750) and Tract 302.02 ($50,380). The figure in brackets is each tract's median household income.
Whether a tract counts as low- or moderate-income for bank lending (the Community Reinvestment Act) is set by the FFIEC against its metro area's family income: look it up in the FFIEC census geocoder.
Source: 2024 Gazetteer and 2020 block assignment files, U.S. Census Bureau · Census reference files
How many people live in Census Tract 306.03?
The 2020-2024 American Community Survey puts Census Tract 306.03's population at 4,198 (±593) in 1,623 households; the 2020 Census counted 4,323 residents and 1,758 housing units.
| Measure | Tract 306.03 | Martinez |
|---|---|---|
| Total population | 4,198 ±593 | 33,750 |
| Households | 1,623 ±323 | 12,599 |
| Average household size | 2.55 ±0.38 | 2.67 |
| Housing units | 1,899 ±313 | 14,533 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Census Tract 306.03?
The median resident of Census Tract 306.03 is 39.2 years old; 16.5% are under 18 and 12.8% are 65 or older. The largest group is non-Hispanic white residents at 57.1%, then non-Hispanic Black residents at 15.4%. 18.4% of residents were born outside the United States.
| Measure | Tract 306.03 | Martinez |
|---|---|---|
| Median age | 39.2 ±4.6 | 39.1 |
| Under 18 years | 16.5% ±4.7 pts | 20.5% |
| 65 years and over | 12.8% ±3.6 pts | 17.7% |
| Hispanic or Latino (any race) | 8.7% ±5.4 pts | 9.7% |
| White alone, not Hispanic | 57.1% ±10.1 pts | 64.7% |
| Black or African American alone, not Hispanic | 15.4% ±6.9 pts | 12.6% |
| Asian alone, not Hispanic | 12.8% ±6.4 pts | 8.1% |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.1 pts | 0.3% |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.1 pts | 0.0% |
| Two or more races, not Hispanic | 6.0% ±3.0 pts | 3.5% |
| Some other race alone, not Hispanic | 0.0% ±1.1 pts | 1.1% |
| Born outside the United States | 18.4% ±8.2 pts | 12.0% |
| Speak a language other than English at home (age 5+) | 17.7% ±7.6 pts | 14.6% |
| Civilian veterans (age 18+) | 6.5% ±3.4 pts | 8.5% |
| With a disability | 12.3% ±6.7 pts | 13.7% |
| No health insurance coverage | 18.3% ±6.1 pts | 13.2% |
| High school graduate or higher (age 25+) | 89.9% ±3.9 pts | 90.2% |
| Bachelor's degree or higher (age 25+) | 31.6% ±8.3 pts | 37.2% |
| Graduate or professional degree (age 25+) | 13.8% ±5.2 pts | 16.8% |
| Lived in the same house a year earlier | 78.7% ±8.1 pts | 85.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Census Tract 306.03 earn?
Half of the 1,623 households in Census Tract 306.03 earn less than $73,355 a year (±$23,173), against $95,592 across Columbia County: 21st highest of the county's 25 tracts with a reliable estimate.
| Measure | Tract 306.03 | Martinez |
|---|---|---|
| Median household income | $73,355 ±$23,173 | $81,602 |
| Mean household income | $93,841 ±$12,613 | $106,040 |
| Per capita income | $40,368 ±$6,969 | $43,122 |
| People below the poverty line | 4.8% ±3.4 pts | 10.0% |
| Children under 18 below the poverty line | 2.2% ±3.8 pts | 17.1% |
| Households receiving SNAP | 7.8% ±6.7 pts | 7.9% |
| Households with a computer | 99.6% ±0.8 pts | 96.3% |
| Households with a broadband subscription | 89.6% ±6.3 pts | 91.3% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Census Tract 306.03?
Owners occupy 58.8% of Census Tract 306.03's occupied homes and renters 41.2%. The median owner-occupied home is valued at $224,900 by its owner (±$12,202). The median renter pays $1,262 a month including utilities.
| Measure | Tract 306.03 | Martinez |
|---|---|---|
| Median home value (owner-occupied) | $224,900 ±$12,202 | $246,100 |
| Median gross rent | $1,262 ±$177 | $1,284 |
| Renters paying 35% or more of income on rent | 14.8% ±12.5 pts | 31.9% |
| Median monthly owner costs, with a mortgage | $1,483 ±$229 | $1,554 |
| Owner-occupied homes | 58.8% ±12.1 pts | 71.2% |
| Renter-occupied homes | 41.2% ±12.1 pts | 28.8% |
| Housing units | 1,899 ±313 | 14,533 |
| Single-family detached homes | 70.0% ±11.5 pts | 77.2% |
| Mobile homes | 1.6% ±2.7 pts | 1.3% |
| Built 2020 or later | 0.9% ±1.4 pts | 1.6% |
| Built 2010 to 2019 | 17.3% ±6.8 pts | 6.6% |
| Built 1939 or earlier | 0.0% ±2.5 pts | 0.2% |
| Households with no vehicle | 1.0% ±1.7 pts | 4.1% |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Census Tract 306.03 get to work?
74.2% of Census Tract 306.03's workers drive alone and 10.4% work from home. The average trip to work takes 20.4 minutes. The unemployment rate in 2020-2024 averaged 5.6%.
| Measure | Tract 306.03 | Martinez |
|---|---|---|
| In the labor force (age 16+) | 70.8% ±7.3 pts | 63.9% |
| Unemployment rate | 5.6% ±3.6 pts | 6.1% |
| Drove alone to work | 74.2% ±8.2 pts | 77.0% |
| Carpooled | 13.0% ±7.2 pts | 12.0% |
| Public transportation | 0.0% ±2.0 pts | 0.1% |
| Walked | 0.0% ±2.0 pts | 0.6% |
| Worked from home | 10.4% ±5.5 pts | 9.4% |
| Mean travel time to work | 20.4 min ±3.0 | 20.6 min |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
How does Census Tract 306.03 compare with the other tracts in Columbia County?
Among Columbia County's tracts with a reliable estimate, Census Tract 306.03 ranks as shown below (1 = highest).
| Measure | In Columbia County | In Martinez |
|---|---|---|
| Population | 18th of 25 | 5th of 7 |
| Residents per square mile | 4th of 25 | 3rd of 7 |
| Median household income | 21st of 25 | 6th of 7 |
| Per capita income | 12th of 25 | 2nd of 7 |
| Median home value | 21st of 25 | 4th of 7 |
| Median gross rent | 18th of 24 | 3rd of 6 |
| Bachelor's degree or higher | 13th of 25 | 4th of 7 |
| Median age | 14th of 25 | 5th of 7 |
| Owner-occupied share | 24th of 25 | 7th of 7 |
The tracts next to it on Columbia County's income ladder
| Tract | Rank | Median household income |
|---|---|---|
| Tract 305.08 | 18th | $74,122±$14,144 · within the margin of this tract |
| Tract 302.01 | 19th | $73,750±$6,930 · within the margin of this tract |
| Tract 302.03 | 20th | $73,444±$13,231 · within the margin of this tract |
| Tract 306.03 | 21st | $73,355±$23,173 |
| Tract 305.05 | 22nd | $71,430±$8,739 · within the margin of this tract |
| Tract 303.13 | 23rd | $70,051±$13,115 · within the margin of this tract |
| Tract 304.01 | 24th | $67,933±$14,498 · within the margin of this tract |
"Within the margin": the two incomes differ by less than their combined 90% margins, so the survey cannot say which is higher and the ranks between them are not firm.
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · How ranks are computed
How reliable are the figures for Census Tract 306.03?
1 of the 18 figures for Census Tract 306.03 on this page carries a coefficient of variation over 40% and is marked with a ring: they come from a small sample, so read them as rough.
A census tract's figures rest on a few hundred sampled households over five years, so its margins are wider than a city's. Two tracts differ only when the gap between them is larger than their combined 90% margin (the square root of the sum of the two squared margins). How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · Check it at data.census.gov
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections